掺杂偶极超晶格气体中赝自旋磁单极子和扭折的相互作用效应
Interaction effects of pseudospin-based magnetic monopoles and kinks in a doped dipolar superlattice gas
摘要：
磁单极子和扭结是量子自旋系统中广泛研究的拓扑激发，但通常它们在不同的设置中进行研究。我们探讨了这些准粒子在原子偶极超晶格气体赝自旋链中共存的条件和相互作用效应。在这个链中，磁扭折是内禀准粒子，粒子/空穴缺陷取代了北/南磁扭折的作用，对邻近的自旋施加单极磁场。发现了微扰和扭结之间的约束效应，使扭结的色散重新正规化。相应的动力学解除禁闭过程中观察到的，并出现由于扭结-反扭结湮灭。这两个准粒子之间丰富的相互作用效应可以激发对体自旋系统的相应研究。
英文摘要：
Magnetic monopoles and kinks are topological excitations extensively investigated in quantum spin systems, but usually they are studied in different setups. We explore the conditions for the coexistence and the interaction effects of these quasiparticles in the pseudospin chain of the atomic dipolar superlattice gas. In this chain, the magnetic kink is the intrinsic quasiparticle, and the particle/hole defect takes over the role of the north/south magnetic monopole, exerting monopolar magnetic fields to neighboring spins. A confinement effect between the monopole and kink is revealed, which renormalizes the dispersion of the kink. The corresponding dynamical deconfinement process is observed and arises due to the kink-antikink annihilation. The rich interaction effects of the two quasiparticles could stimulate corresponding investigations in bulk spin systems.
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